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I need some help with uninitialized local variables

pdaniels0013 (5)
I'm working on a homework assignment for my college c++ class. I'm new to c++ and have only been programming in java in my first semester of college with no prior experience. In this program, I'm having a compiler error that says the local variable "lower" is no being initialized. I am almost sure it is, and I have tried everything I can within my scope of ideas and I have no clue what is wrong. The variable in question is in the function "myProd." Thank you so much for the help

NOTE: The professor is teaching us how to use functions, and specifically stated that we cannot use global variables

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#include<iostream>;

using std::cout;
using std::endl;
using std::cin;

int myPrompt(void)
{
	bool variable = true;
	int input;

	cout << "Please input a non negative integer: ";
	cin >> input;

	while (variable == true)
	{
		if(input <=-1)
		{
			cout << "Your input of " << input << " is not a valid integer. Please input a non negative integer: ";
			cin >> input;
		}
		else
		{
			variable = false;
		}

	}	
	return (input);
}

int mySum(int input2)
{
	int temp = 0;
	int temp2 = 0;
	int value = input2;

	for(int i = 0; i <= value; i++)
	{
			temp = i + temp2;
			temp2 = temp;
	}	

	return temp2;
}

int myProd(int input3)
{
	int value2 = input3;

	int upper = value2;
	int temp4 = 1;	
	int lower = 1;
	int temp3 = 1;
	

	if(upper == 1)
	{
		return 1;
	}
	else
	{
		temp4 = 1 * (1 + 1);
		lower = 1 + 2;
		
		while(lower <= upper)
		{
			int temp3 = temp4 * lower;
			int temp4 = temp3;
			int lower = lower + 1;
		}

			value2 = temp3;
			return value2;
	}
}

int myMod(int input4)
{

	int value3 = input4;
	
	value3 = value3 % 7;

	return value3;
}

int main()
{		
	int input5 = myPrompt();
		
	while(input5 != -9999)
	{

		if(input5 <= 9)
		{
			cout << "The product from 1 to " << input5 << " is " << myProd(input5) << endl;
		}

		if( (input5 >= 10) &&  (input5 <= 50) )
		{
			cout << "The sum from 1 to " << input5 << " is " <<  mySum(input5) << endl;
		}		

		if(input5 >= 51)
		{
			cout << "The remainder of " << input5 << " / 7 is " << myMod(input5) << endl;
		}
		
		input5 = myPrompt();
	}
}

freddy92 (274)
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int temp3 = temp4 * lower;
int temp4 = temp3;
int lower = lower + 1;

You need to remove "int" from these lines. You are actually declaring new variables rather than modifying existing ones.
pdaniels0013 (5)
That fixed it. Thanks a lot!
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